webkit/browser/quota/quota_task.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "webkit/browser/quota/quota_task.h"
   6
   7 #include <algorithm>
   8 #include <functional>
   9
  10 #include "base/bind.h"
  11 #include "base/location.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/message_loop/message_loop_proxy.h"
  14 #include "base/single_thread_task_runner.h"
  15
  16 using base::TaskRunner;
  17
  18 namespace storage {
  19
  20 // QuotaTask ---------------------------------------------------------------
  21
  22 QuotaTask::~QuotaTask() {
  23 }
  24
  25 void QuotaTask::Start() {
  26   DCHECK(observer_);
  27   observer()->RegisterTask(this);
  28   Run();
  29 }
  30
  31 QuotaTask::QuotaTask(QuotaTaskObserver* observer)
  32     : observer_(observer),
  33       original_task_runner_(base::MessageLoopProxy::current()),
  34       delete_scheduled_(false) {
  35 }
  36
  37 void QuotaTask::CallCompleted() {
  38   DCHECK(original_task_runner_->BelongsToCurrentThread());
  39   if (observer_) {
  40     observer_->UnregisterTask(this);
  41     Completed();
  42   }
  43 }
  44
  45 void QuotaTask::Abort() {
  46   DCHECK(original_task_runner_->BelongsToCurrentThread());
  47   observer_ = NULL;
  48   Aborted();
  49 }
  50
  51 void QuotaTask::DeleteSoon() {
  52   DCHECK(original_task_runner_->BelongsToCurrentThread());
  53   if (delete_scheduled_)
  54     return;
  55   delete_scheduled_ = true;
  56   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
  57 }
  58
  59 // QuotaTaskObserver -------------------------------------------------------
  60
  61 QuotaTaskObserver::~QuotaTaskObserver() {
  62   std::for_each(running_quota_tasks_.begin(),
  63                 running_quota_tasks_.end(),
  64                 std::mem_fun(&QuotaTask::Abort));
  65 }
  66
  67 QuotaTaskObserver::QuotaTaskObserver() {
  68 }
  69
  70 void QuotaTaskObserver::RegisterTask(QuotaTask* task) {
  71   running_quota_tasks_.insert(task);
  72 }
  73
  74 void QuotaTaskObserver::UnregisterTask(QuotaTask* task) {
  75   DCHECK(running_quota_tasks_.find(task) != running_quota_tasks_.end());
  76   running_quota_tasks_.erase(task);
  77 }
  78
  79 }  // namespace storage